addresses #814

readd lock around f'n

git-svn-id: file:///svn/mysql/tokudb-engine/src@4942 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -1735,6 +1735,7 @@ int ha_tokudb::read_last() {
 //
 void ha_tokudb::init_hidden_prim_key_info() {
     TOKUDB_DBUG_ENTER("ha_tokudb::init_prim_key_info");
+    pthread_mutex_lock(&share->mutex);
     if (!(share->status & STATUS_PRIMARY_KEY_INIT)) {
         (void) extra(HA_EXTRA_KEYREAD);
         int error = read_last();
@@ -1755,6 +1756,7 @@ void ha_tokudb::init_hidden_prim_key_info() {
 
         share->status |= STATUS_PRIMARY_KEY_INIT;
     }
+    pthread_mutex_unlock(&share->mutex);
     DBUG_VOID_RETURN;
 }